The nutrient element silicon (Si) is:_________?
The nutrient element silicon (Si) is:_________?
			A. Beneficial
B. Harmful
C. Both a and b
D. None of the above
		A. Beneficial
B. Harmful
C. Both a and b
D. None of the above
		A. Liebig
B. Baussingault
C. Hiltner
D. Winogrdsky
		A. Cellulose
B. Hemicellulose
C. Lignin
D. All of these
		A. E-Value
B. L-Value
C. a-Value
D. A-Value
		A. 2.50 %
B. 3.50 %
C. 4,50 %
D. 5.5 %
		A. Vanadium
B. Cobalt
C. Sodium
D. Nickle
		A. 10%
B. 20%
C. 30%
D. 35%
		A. Tofography
B. topograpy
C. Topography
D. All of the above
		A. Fundamentals of soil
B. Essenttials of soil sciences
C. The nature and properties of soil
D. The mechanics of soil
		A. Mixed indicator
B. Diphenylamine indicator 
C. Both a and b
D. None of the above